A new analysis from NASA says there could be as many as 40 billion habitable Earth-sized planets in the galaxy, with the nearest being 12 light years away. NBC’s Brian Williams reports.

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>>>decided we have once and for all trashed the utter, nasa says there could be many habitable planets. the nearest is 12 light years away, visible to the
naked eye
at night, but a long trip any way you look at it.